SUPPLEMENTAL BALANCE SHEET INFORMATION - Trade Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Trade receivables and contract assets
Trade receivables	$ 66,771	$ 21,402
Unbilled revenue	8,246	7,630
Total	75,017	29,032
Less: Allowance for doubtful accounts	(3,068)	(668)
Trade receivables and contract assets, net of allowances for doubtful accounts	$ 71,949	$ 28,364

Carrying amount as of the balance sheet date of gross trade receivables and contract assets.

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- Definition

Carrying amount as of the balance sheet date of trade receivables and contract assets, after allowance for credit loss.

+ References

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- Definition

Carrying amount as of the balance sheet date of unbilled revenues.

+ References

No definition available.

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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